Going to re-post this here (is a wall of text so be warned)
My fluxomizer journey to date:
Ordered: GotVapes FLuXomizer™ DeLuXe CLEAR NoTint 510 REG .9ml 2.6-2.8ohm, 2 packages. Received 2 packages of 5 ea. devices. Had researched this product (you tube, ECF forum, other forums, etc.) and suspected that these devices would not be "ready to go" right out of the package; low and behold, I was right.
I am also a noob to vaping - like direct dripping but do not like the process; use cartos but do not like the flavor reduction due to the carto filling material.
So - the .9ml devices came packaged in a foam grid (all the videos I saw showed the product in a foil/cellophane like package), also no middle O ring; thought that perhaps I had received the wrong product. E-mailed GotVapes (twice) in regards to packaging and no O ring, did get 2 replies that the .9ml size have no O rings and that sometimes the smaller size is shipped in foam. OK let's give this product a try. (BTW have to use an illuminated 10x stand mounted magnifying glass to even see the parts on these things seems I am getting older by the minute).
Read the directions and decide to try one as is out of the box. Try to use the provided filling needle -will not fit in the holes provided so try the "drilling" method as per one of the how to videos. Rubber plug filled the needle (no way to remove the rubber) rendering the supplied needle useless. What now - wait, I have an injectable grade needle (aka sharps); manage to orient the beveled side against the tube and very gently slide this needle past the bottom plug and successfully "fill" with juice.
Wait perhaps two minutes and can see that the wick at the ceramic cup is wet so take vape - horrible burned flavor; wait perhaps another five minutes, vape again - horrible burned flavor. What now?
Do some more research and find out that perhaps you need to "pre-burn" the wick and that preburning is not recommended with the bottom plug in place. Time for bottom plug removal. Review how to videos and proceed with bottom plug removal; promptly broke ceramic cup; tried again on a different tube and destroyed bottom plug. So now have ruined two devices.
Do some more research and find the trick of removing the tube from the battery connection; try this on two broken devices, works and manage to make a workable device from the parts. Proceed to clean and dry burn the wick - fill with juice - take vape and WOW. Had a vv device @ 4.2v, immediately reduced it to 3.7v and double WOW; great vape. Moved fluxomizer to standard eGo type 3.7v device, and still WOW. When working, the vape from the fluxomizer is incredible.
For the heck of it, kept the time spent on "fiddling" with this product (would use another "f" word but not polite, and when working is an unbelievable vape); have spent over 14 hours "fiddling" now have seven usable devices out of 10.
Other issues: have not been able to get the bottom plug to fully re-seat as it comes from the factory; when in a horizontal position the devices will leak (overnight); dry hits - hold upside down - count one, two, three - no more dry hit. One leaks from the battery connector; I probably damaged the breathing tube connection with my "fiddling". Have not cracked a tube.
As of right now the "jury is out" for me in regards to this product. When working, INCREDIBLE VAPE, "fiddling" to get working, not great at all. Do not know anything about long term use; with shipping costs me about $2.20 each; have refilled 2 four times.
These things just eat the juice.
Sorry for the wall of text - but perhaps this might provide some help to you or others.
BTW, at this time I will choose to believe that the people at GotVapes are really trying to develop a superior vaping product; and if successful should reap financial rewards.
Just not quite there yet.
Follow up - plastic taste (IMHO) is caused by the proximity of the lower/notched cup to the ceramic cup; when slightly offset no rubber/plastic taste.